Philippe Ricaud

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Tropical stratospheric water vapor measured by the microwave limb sounder (M 1.S), " Geophys. Comparison of C1O measurements made by airborne and spaceborne microwave radiometers in the arctic winter stratosphere 1993, " Geophys. Correlated ollservations of HC1 and C1ONO2 from UARS and implications for stratospheric chlorine partitioning, " Geophys. Res.(More)
We have used an off-line three-dimensional (3-D) chemical transport model (CTM) to study long-term changes in stratospheric O 3. The model was run from 1977–2004 and forced by ECMWF ERA-40 and operational analyses. Model runs were performed to examine the impact of increasing halogens and additional stratospheric bromine from short-lived source gases. The(More)
The mechanism of troposphere-stratosphere exchange in the tropics was investigated from space-borne observations of the horizontal distributions of nitrous oxide (N 2 O), methane (CH 4) and carbon monoxide (CO) at 17 km in March-April-May by the ODIN/Sub-Millimeter Radiometer (SMR), the Upper Atmosphere Research Satel-5 lite (UARS)/Halogen Occultation(More)
HIBISCUS was a field campaign for investigating the impact of deep convection on the Tropical Tropopause Layer (TTL) and the Lower Stratosphere, which took place during the Southern Hemisphere summer in February–March 2004 in the State of S ˜ ao Paulo, Brazil. Its objective was to provide a set of new observational data on meteorology, 5 tracers of(More)
We present the configuration of the Météo-France Chemistry and Transport Model (CTM) MOCAGE-Climat that will be dedicated to the study of chemistry and climate interactions. MOCAGE-Climat is a state-of-the-art CTM that simulates the global distribution of ozone and its precursors (82 chemical species) both in the troposphere and the stratosphere, up to the(More)
—We present a new compact and automated ground-based microwave mobile radiometer dedicated to the study of middle atmospheric water vapor, which is convenient for measurement , intercomparison, and validation campaigns, particularly in remote places. The instrument detects the 6 16 −5 23 H 2 O transition line at 22.235 GHz by means of balanced(More)
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Aims. Over the past few years a major effort has been put into the exploration of potential sites for the deployment of submillimetre astronomical facilities. Amongst the most important sites are Dome C and Dome A on the Antarctic Plateau, and the Chajnantor area in Chile. In this context, we report on measurements of the sky opacity at 200 μm over a period(More)
—The H 2 O Antarctica Microwave Stratospheric and Tropospheric Radiometers (HAMSTRAD) program aims to develop two ground-based microwave radiometers to sound tropo-spheric and stratospheric water vapor (H 2 O) above Dome C (Concordia Station), Antarctica (75 • 06 S, 123 • 21 E, 3233 m asml), an extremely cold and dry environment, over decades. By using(More)